gallagher



(No Model.) 2 Sheets-Sheet 1. G. F. GALLAGHER 85 T. B. MOORE.

FURNAGB. No. 414 151. Patented Oct. 29, 1889.

N. FETEHS. Phoko-Lilhoguphor, Wuflnmn, Dv C.

2 Sheets-Sheet 2. G. F. GALLAGHER 8v T. B. MOORE.

FURNACE.

Patented Oct. 29, 1889.

(No Model.)

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UNITED STATES PATENT UFFICEQ GEORGE E. GALLAGHER AND THOMAS E. MOORE, OF ROCHESTER, NElV YORK, ASSIGNORS OF ONE-THIRD TO HENRY GALLAGHER, OF SAME PLACE.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 414,151, dated October 29, 1889.

Application filed January 16, 1889. Serial No. Z96A74. (N model.)

To all whom, it may concern.- The parts thus far described are of ordinary Be it known that we, GEORGE F. GALLA- and well-known construction, and to these we GHER and THOMAS B. MOORE, citizens-0f the have applied our improvements, as follows: United States, residing at Rochester, in the g g and h h are air-passages located above 55 county of Monroe and State of New York, the grate-bars and leading from the outside have invented certain new and useful Imof the boiler to the rear of the fire-box, and provements in Furnaces; and we do hereby then returning to the front of the fire-box and declare the following to be a full, clear, and discharging the air in a highly-heated state exact description of the invention, such as at that point. The air from the passage 9 60 will enable others skilled in the art to which coming through the door g (see Fig. 3) is it appertains to make and use the same, refconducted through the passage g around the erence being had to the accompanying drawsection (I of the fire-box, and discharging ings, and to the letters or figures of reference into the front of the firebox, as at y and the marked thereon, which form a part of this air passing through the door 9' is conducted 65 I 5 specification. through the passage g around the section cl This invention relates to certain iniproveof the fire-box, and discharging at the openments in furnaces of the class for which Leting g Directly under these passages g g are ters Patent No. 391,310 were granted October the passages h 71/, having their inlet-doors 7&2 16, 1888, to George F. Gallagher. In this class and h" in the center of the front of the fur- 7o of furnaces passages are provided for connace, and the passages extend, respectively, ducting air from the outside to the rear of around the sections (Z and d of the fire-box, the firebox and discharging the air thus and discharge the air in ahighly-heated state heated into the fire-box. at h and 7&5. It will be seen that by this 0011- To the above invention we have added our struction highly-heated air is fed to the front 75 improvement by building an arch over the of the sections (Z d of the fire-box on both fire-box extending from the rear nearly to the sides, as clearly shown in Fig. 2. front of the same, and taking the air from the To the rear of the sections (1 cl of the fireash-pit through the grate-bars in the usual boX, I have arranged the walls jj, extending way, as well as from the passages above mennearly to the arches 7t, and in the bridgeo tioned, and also taking an auxiliary current wall 121, I have arranged a channel or passage of cold air up through the bridge-wall at the m to allow a small current of cold air to pass back of the fire-box, where it is discharged in from the ash-pit up between the bridge-wall the upper rear end of the fire-box, the combiand walls jj, and is fed to the rear of the firenation of these drafts iving a more complete box sections (1 cl directly under the arches 7; 8 5 5 consumption of the particles of combustion. k, which extend over the fire box sections XVe will now proceed to more definitely defrom the bridge-wall toward the front f urnaccscribe the manner in which we have carried wall, but not entirely to such wall, leaving a out our invention. space between. the front ends of these arches In the drawings, Figure l is a longitudinal and the front wall of the fire-box, through 40 vertical section of our improved furnace. Fig. which the heated air passes up between the 2 is a transverse vertical section taken in the top of the arches and the boiler to the comline a; a: in Fig. 1; Fig. 3 is a horizontal secbustion chamber. It will be seen that the firetion of the fire-box, and Fig. 4 is a partial box is supplied with highly-heated air from front view of our improved furnace. the passages h g h g. The draft is caused 45 Referring to the drawings a a are the walls to pass in the usual way up through the ashof the fire-box, in which is seated the boiler 12. pit; but a portion of this cold air in the ashc are the grate-bars, above which is the firepit is drawn up through the back passages m box divided into sections (Z (2', and below the m and discharged into the rear of the fireash-pit e. A box under the arches, thus supplying a lim I00 50 f f are the doors to the firebox, and f f the ited but suffioient quantity of oxygen, which usual doors to the ash-pit. (See Fig. 4.) aids materially in the consumption of the products of combustion, and at the same time maintains a current or draft forward to the points of discharge at the front of the arches. The'highly-heated air from the passages g h g h is also discharged at the front of the fire-boxes.

YVe claim- 1. In a furnace, air-passages, as shown, for conveying the air from the outside to the rear of the fire-box and discharging it therein in a heated state, such passages starting at the sides of the fire-box and returning at the center, substantially as shown and described.

2. The furnace having the ash-pit e, bridgewall m, inner wall j, with passage m between said walls and connecting the ash -pit and fire-box, and the arch 75 over the fire-box, substantially as and for the purpose stated.

3. In a furnace, the combination, with the In testimony whereof we have signed our 30 names to this specification in the presence of two subscribing witnesses.

GEORGE F. GALLAGHER. THOMAS B. MOORE.

Witnesses: WV. T. MILLER, OTTO I-IoDDIoK. 

